Readlyn Threshold Days by Year (CA004026480)

15 fixed thresholds counted per year at Readlyn (CA004026480): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Readlyn Thresholds

Readlyn: nights with a minimum temperature at or below 0 C (32 F) in 22 years, most in 1965 with 218.
Readlyn: nights with a minimum temperature at or below -10 C (14 F) in 22 years, most in 1975 with 127.
Readlyn: nights with a minimum temperature at or below -20 C (-4 F) in 22 years, most in 1965 with 73.
Readlyn: nights with a minimum temperature at or below -30 C (-22 F) in 22 years, most in 1972 with 25.
15 fixed thresholds have at least one qualifying day at Readlyn.

Days at or above 30 C (86 F)

19 years with a qualifying day

Days per year at Readlyn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 51 in 1961.

Days at or above 30 C (86 F) per year at Readlyn
Year	Days	Decade average
1955	20	27
1956	20	27
1957	31	27
1958	33	27
1959	31	27
1960	27	30.4
1961	51	30.4
1964	32	30.4
1965	21	30.4
1966	29	30.4
1967	37	30.4
1968	16	30.4
1970	39	23.1
1971	34	23.1
1972	14	23.1
1973	21	23.1
1975	15	23.1
1976	9	23.1
1979	30	23.1

For each year, a bar from the first to the last day at Readlyn meeting 30 C (86 F).

First to last qualifying date each year at Readlyn
Year	First date	Last date
1955	1955-06-29	1955-09-14
1956	1956-06-01	1956-09-26
1957	1957-05-30	1957-10-01
1958	1958-05-11	1958-09-12
1959	1959-06-02	1959-08-28
1960	1960-05-11	1960-09-04
1961	1961-05-29	1961-09-17
1964	1964-05-17	1964-10-13
1965	1965-07-03	1965-08-15
1966	1966-05-21	1966-09-11
1967	1967-06-26	1967-09-30
1968	1968-06-02	1968-09-11
1970	1970-06-03	1970-08-31
1971	1971-06-13	1971-09-11
1972	1972-06-01	1972-08-29
1973	1973-05-31	1973-08-20
1975	1975-06-24	1975-08-06
1976	1976-07-17	1976-09-17
1979	1979-05-25	1979-09-15

Every Fixed Threshold

Fixed thresholds at Readlyn
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	19	51	1961	30
35 C (95 F): Days	19	10	1961	1
90 F (32.2 C): Days	19	35	1961	14
100 F (37.8 C): Days	9	3	1971	1
0 C (32 F): Ice days (max	19	118	1955	100
0 C (32 F): Frost days (min	22	218	1965	208
-10 C (14 F): Days with min	22	127	1975	122
-20 C (-4 F): Days with min	22	73	1965	66
-30 C (-22 F): Days with min	22	25	1972	15
-40 C (-40 F): Days with min	6	2	1959	1
20 C (68 F): Tropical nights (min	12	4	1971	2
10 mm (0.39 in): Days with 10 mm or more rain	22	14	1965	4
25 mm (0.98 in): Days with 25 mm or more rain	16	4	1955	1
50 mm (1.97 in): Days with 50 mm or more rain	7	1	1955	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	4	1959	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

Data for Readlyn threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Readlyn Threshold Days by Year (CA004026480)

Key Facts for Readlyn Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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